exam Maths Puzzle Numerical Ability

DR MENTO HAS A CLASS OF 80 STUDENTS. FOR A GROUP PROJECT SHE WANTS TO DIVIDE THE STUDENTS INTO GROUPS OF 6, 8, 10. IS THIS POSSIBLE? EXPLAIN YOUR ANSWER.

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exam Other Question

Consider triangle ABC in the plane where
A=(-1,15)
B=(-6,8)
C=(-27,23)

Find the lengths of the sides of the triangle:
AB=
BC=
AC= one angle of a triangle is 20 degrees. the second angles measurement is four times the third. what is the measure of the third angle?